Year	Percent
1950	11.37176
1955	11.11372
1960	11.41296
1965	12.35635
1970	12.13757
1975	12.01807
1980	12.64095
1985	12.95729
1990	12.56117
1995	12.55711
2000	13.49389
2005	14.07511
2010	12.33487
2015	10.99146
2020	10.71365
2025	10.08947
2030	9.47569
2035	8.78548
2040	8.14722
2045	7.604
2050	7.14306
2055	6.74343
2060	6.39522
2065	6.09884
2070	5.85598
2075	5.67606
2080	5.53773
2085	5.41826
2090	5.31441
2095	5.2272
2100	5.15474